Large memcapacitance and memristance at Nb:SrTiO3_{3} / La0.5_{0.5}Sr0.5_{0.5}Mn0.5_{0.5}Co0.5_{0.5}O3−δ_{3-\delta} Topotactic Redox Interface

The possibility to develop neuromorphic computing devices able to mimic the extraordinary data processing capabilities of biological systems spurs the research on memristive systems. Memristors with additional functionalities such as robust memcapacitance can outperform standard devices in key aspects such as power consumption or miniaturization possibilities. In this work, we demonstrate a large memcapacitive response of a perovskite memristive interface, using the topotactic redox ability of La$_{0.5}$Sr$_{0.5}$Mn$_{0.5}$Co$_{0.5}$O$_{3-\delta}$ (LSMCO, 0 $\leq$ $\delta$ $\leq$ 0.62). We demonstrate that the multi-mem behaviour originates at the switchable n-p diode formed at the Nb:SrTiO3/LSMCO interface. We found for our Nb:SrTiO$_{3}$/LSMCO/Pt devices a memcapacitive effect C$_{HIGH}$/C$_{LOW}$ ~ 100 at 150 kHz. The proof-of-concept interface reported here opens a promising venue to use topotactic redox materials for disruptive nanoelectronics, with straightforward applications in neuromorphic computing technology.Comment: 14 pages, 5 figures, to appear in Appl. Phys. Let

Satellite networking integration in the 5G ecosystem: Research trends and open challenges

The envisioned 5G ecosystem will be composed of heterogeneous networks based on different technologies and communication means, including satellite communication networks. The latter can help increase the capabilities of terrestrial networks, especially in terms of higher coverage, reliability, and availability, contributing to the achievement of some of the 5G KPIs. However, technological changes are not immediate. Many current satellite communication networks are based on proprietary hardware, which hinders the integration with future 5G terrestrial networks as well as the adoption of new protocols and algorithms. On the other hand, the two main paradigms that are emerging in the networking scenario \u2014 software defined networking (SDN) and network functions virtualization \u2014 can change this perspective. In this respect, this article presents first an overview of the main research works in the field of SDN satellite networks in order to understand the already proposed solutions. Then some open challenges are described in light of the network slicing concept by 5G virtualization, along with a possible roadmap including different network virtualization levels. The remaining unsolved problems are related to the development and deployment of a complete integration of satellite components in the 5G ecosystem

A concept analysis: Support for lay healthcare workers in HIV services, Bojanala District, North West

Background: Different lay healthcare workers play an important role in the retention of clients to human immunodeficiency virus (HIV) care. Retention to HIV care is crucial to promote treatment continuation, viral suppression and reduced risk of transmission. However, lay healthcare workers view and perceive support differently. Objectives: The aim of the study was to investigate perceptions of healthcare workers regarding support provided to lay healthcare workers in HIV services. This article is a report of a concept analysis of healthcare workers’ support provided to lay healthcare workers in HIV services, that was collected during the study. A concept analysis was done to explore the support attributes, clarify meaning and to understand its use within the lay healthcare workers’ context in Bojanala District, situated in the North West province of South Africa. Method: The initial phase was data collection from lay healthcare workers, their supervisors and clients on antiretroviral therapy. Thereafter, the eight concept analysis steps of Walker and Avant were followed. Peer-reviewed articles on the support concept were searched and guided by data saturation. Results: Responsiveness, provision, reciprocity and integration are key characteristics of support. Conclusion: Despite support being an interpersonal process, it is perceived subjectively. Support is necessary to continuously promote growth or endurance during adverse times. Contribution: The concept analysis will provide common understanding of support and information that is responsive to the needs of different lay healthcare workers

Convergence and approximation results for measurable multifunctions

In this note we consider measurable multifunctions taking values in a separable Banach space. We show that if F ( ω ) ⊆ s − lim F n ( ω ) F(\omega ) \subseteq {\text {s}} - \lim {F_n}(\omega ) , then any Castaing representation of the F ( ⋅ ) F( \cdot ) can be obtained as the strong limit of Castaing representations of the F n {F_n} . We also prove that any weakly measurable multifunction is the Kuratowski-Mosco limit of a sequence of countably simple multifunctions. Then we show that in reflexive Banach spaces this approximation property is equivalent to weak measurability. Finally we discuss the problem of measurability of the inferior and w {\text {w}} -superior limits of a sequence of measurable multifunctions.</p

Enlarged Dural Sac in Idiopathic Bronchiectasis Implicates Heritable Connective Tissue Gene Variants

Rationale: Patients with idiopathic bronchiectasis are predominantly female and have an asthenic body morphotype and frequent nontuberculous mycobacterial respiratory infections. They also demonstrate phenotypic features (scoliosis, pectus deformity, mitral valve prolapse) that are commonly seen in individuals with heritable connective tissue disorders

Association between Hashimoto's thyroiditis and papillary thyroid carcinoma: A retrospective analysis of 305 patients

Background: The association between Hashimoto's thyroiditis (HT) and papillary thyroid carcinoma (PTC) is a controversial question that is still under debate, its pathological significance and the eventual clinical implications of this association remaining unclear. Methods: The data regarding 305 patients were retrospectively analyzed. The patients were divided in two different groups. A first group made up of 142 patients undergoing surgery for differentiated thyroid carcinoma was compared to a control group of 142 analogous subjects operated for normofunctioning goiter. A second group was made up of 163 patients who had undergone total thyroidectomy (TT) with pre-operative diagnosis of HT. Results: In the first group of patients an association with HT was found in 28,6% of the patients with final histopathological diagnosis of PTC versus 7,7% of the patients with histopathological diagnosis of multinodular goiter, which was a significant difference (p &lt; 0.001). In the second group, the association with PTC was found in 43 (40,2%) cases of HT nodular variant and in 3 cases (8,1%) of HT diffuse variant (p &lt; 0.001). Conclusions: The relationship between HT and PTC is still far from clear and represents an unresolved issue. Our own study has underlined the frequent coexistence of these two pathologies, an aspect not to be neglected in clinical practice. Patients receiving HT diagnosis should undergo careful follow-up and, especially those with the nodular variant, should undergo a frequent both clinical and cytological evaluation of the nodular lesions, taking always into great consideration the surgical approach of total thyroidectomy